git_infra

publish_www (2051B)

---

 #!/bin/sh -e
 #
 # post-receive.d hook: publish the built site to the web root.
 #
 # Install:
 #   /home/git/git_infra/post-receive.d/publish_www          (this file, chmod +x)
 #   /home/git/bracken_jp.git/hooks/post-receive.d/publish_www -> symlink to it
 #
 # Note this is symlinked ONLY into bracken_jp.git, unlike gout_html which is
 # linked into every repo.
 
 BRANCH="master"
 WWW="/var/www/chris.bracken.jp"
 
 # Files must be readable by the www user in the www jail, which reads this
 # same dataset over a read-only nullfs mount.
 umask 022
 
 # Hooks are called from the repo directory.
 repo_dir=$(pwd)
 
 # Refuse to run if the web root is missing or not writable. Without this a
 # missing nullfs mount would publish into the jail's own filesystem, which
 # would look like it worked and serve nothing.
 if [ ! -d "$WWW" ]; then
     echo "[publish] ERROR: $WWW does not exist - is the nullfs mount attached?" >&2
     exit 1
 fi
 if [ ! -w "$WWW" ]; then
     echo "[publish] ERROR: $WWW is not writable" >&2
     exit 1
 fi
 
 # stdin gives one line per updated ref: <old> <new> <refname>
 pushed=0
 while read -r _old new ref; do
     [ "$ref" = "refs/heads/${BRANCH}" ] || continue
     # Branch deletion - do not wipe the live site.
     [ "$new" = "0000000000000000000000000000000000000000" ] && continue
     pushed=1
 done
 
 if [ "$pushed" = "0" ]; then
     echo "[publish] ${BRANCH} not updated; nothing to publish"
     exit 0
 fi
 
 echo "[publish] Publishing ${BRANCH} to ${WWW}"
 
 # checkout -f writes/overwrites every tracked file into the work tree.
 git --git-dir="$repo_dir" --work-tree="$WWW" checkout -f "$BRANCH"
 
 # checkout -f does not remove files deleted from the branch, so clean up
 # anything untracked. This is what made `reset --hard` sufficient before.
 #
 # NOTE: this deletes ANY untracked file under $WWW. That is correct while the
 # whole tree is repo-managed. If you ever need to keep something unmanaged
 # there, add it to .gitignore AND drop -x, or this will remove it.
 git --git-dir="$repo_dir" --work-tree="$WWW" clean -fd
 
 echo "[publish] Done"